VIPER15LD

Overview

The VIPER15LD is a high voltage converter from the VIPerPlus family, integrating an 800 V avalanche-rugged power MOSFET with PWM current mode control. It features embedded HV startup and sense-FET for simplified design. The device supports flyback, buck, and buck boost topologies with low consumption, operating in pulse frequency modulation under light load. It includes drain current limit protection, thermal shutdown, and built-in soft-start.

Feature Summary

• Integrates an 800 V avalanche-rugged power MOSFET for extended input voltage range
• Embedded HV startup and sense-FET minimize external component count
• Current mode PWM controller with jittered switching frequency reduces EMI filter cost
• Comprehensive protection suite including overload/short-circuit, OVP, and thermal shutdown

Applications

• Flyback converter designs
• Buck converter applications
• Buck-boost converter implementations

Procurement Notes

Verify the specific package variant (e.g., 16SO or 7DIP) as suffixes denote physical form factors rather than functional changes. Confirm the exact ordering part number against the manufacturer's official datasheet to ensure compatibility with the intended PCB layout and thermal requirements. Cross-reference the latest errata documents for any known silicon revisions or packaging updates prior to finalizing procurement orders.

Selection Notes

Select this component for applications requiring ultra-wide AC input voltage coverage and minimized system input power consumption. The integrated sense-FET and HV startup allow for the removal of auxiliary windings or bias components, simplifying the transformer design. Ensure the application benefits from the reduced EMI filter costs enabled by the jittered switching frequency and requires robust protection against short-circuits and overloads.

Part Context

The VIPER15LD belongs to the VIPerPlus family of low voltage energy-saving fixed frequency high voltage converters. This series is designed to meet stringent energy-saving standards with very low consumption. The family integrates power MOSFETs with PWM controllers, targeting efficient power supply designs for various consumer and industrial electronics where size and efficiency are critical constraints.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-references through official STMicroelectronics channels or authorized distributor substitution tools before considering alternative components.